1*83d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+ 2ca1de0b5SKeerthy /* 3ca1de0b5SKeerthy * (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com> 4ca1de0b5SKeerthy * Keerthy <j-keerthy@ti.com> 5ca1de0b5SKeerthy */ 6ca1de0b5SKeerthy 7ca1de0b5SKeerthy #include <common.h> 8ca1de0b5SKeerthy #include <fdtdec.h> 9ca1de0b5SKeerthy #include <errno.h> 10ca1de0b5SKeerthy #include <dm.h> 11ca1de0b5SKeerthy #include <i2c.h> 12ca1de0b5SKeerthy #include <power/pmic.h> 13ca1de0b5SKeerthy #include <power/regulator.h> 14ca1de0b5SKeerthy #include <power/lp873x.h> 15ca1de0b5SKeerthy #include <dm/device.h> 16ca1de0b5SKeerthy 17ca1de0b5SKeerthy static const struct pmic_child_info pmic_children_info[] = { 18ca1de0b5SKeerthy { .prefix = "ldo", .driver = LP873X_LDO_DRIVER }, 19ca1de0b5SKeerthy { .prefix = "buck", .driver = LP873X_BUCK_DRIVER }, 20ca1de0b5SKeerthy { }, 21ca1de0b5SKeerthy }; 22ca1de0b5SKeerthy 23ca1de0b5SKeerthy static int lp873x_write(struct udevice *dev, uint reg, const uint8_t *buff, 24ca1de0b5SKeerthy int len) 25ca1de0b5SKeerthy { 26ca1de0b5SKeerthy if (dm_i2c_write(dev, reg, buff, len)) { 279b643e31SMasahiro Yamada pr_err("write error to device: %p register: %#x!", dev, reg); 28ca1de0b5SKeerthy return -EIO; 29ca1de0b5SKeerthy } 30ca1de0b5SKeerthy 31ca1de0b5SKeerthy return 0; 32ca1de0b5SKeerthy } 33ca1de0b5SKeerthy 34ca1de0b5SKeerthy static int lp873x_read(struct udevice *dev, uint reg, uint8_t *buff, int len) 35ca1de0b5SKeerthy { 36ca1de0b5SKeerthy if (dm_i2c_read(dev, reg, buff, len)) { 379b643e31SMasahiro Yamada pr_err("read error from device: %p register: %#x!", dev, reg); 38ca1de0b5SKeerthy return -EIO; 39ca1de0b5SKeerthy } 40ca1de0b5SKeerthy 41ca1de0b5SKeerthy return 0; 42ca1de0b5SKeerthy } 43ca1de0b5SKeerthy 44ca1de0b5SKeerthy static int lp873x_bind(struct udevice *dev) 45ca1de0b5SKeerthy { 467a869e6cSSimon Glass ofnode regulators_node; 47ca1de0b5SKeerthy int children; 48ca1de0b5SKeerthy 497a869e6cSSimon Glass regulators_node = dev_read_subnode(dev, "regulators"); 507a869e6cSSimon Glass if (!ofnode_valid(regulators_node)) { 517a869e6cSSimon Glass debug("%s: %s regulators subnode not found!", __func__, 527a869e6cSSimon Glass dev->name); 53ca1de0b5SKeerthy return -ENXIO; 54ca1de0b5SKeerthy } 55ca1de0b5SKeerthy 56ca1de0b5SKeerthy children = pmic_bind_children(dev, regulators_node, pmic_children_info); 57ca1de0b5SKeerthy if (!children) 58ca1de0b5SKeerthy printf("%s: %s - no child found\n", __func__, dev->name); 59ca1de0b5SKeerthy 60ca1de0b5SKeerthy /* Always return success for this device */ 61ca1de0b5SKeerthy return 0; 62ca1de0b5SKeerthy } 63ca1de0b5SKeerthy 64ca1de0b5SKeerthy static struct dm_pmic_ops lp873x_ops = { 65ca1de0b5SKeerthy .read = lp873x_read, 66ca1de0b5SKeerthy .write = lp873x_write, 67ca1de0b5SKeerthy }; 68ca1de0b5SKeerthy 69ca1de0b5SKeerthy static const struct udevice_id lp873x_ids[] = { 70ca1de0b5SKeerthy { .compatible = "ti,lp8732", .data = LP8732 }, 71ca1de0b5SKeerthy { .compatible = "ti,lp8733" , .data = LP8733 }, 72ca1de0b5SKeerthy { } 73ca1de0b5SKeerthy }; 74ca1de0b5SKeerthy 75ca1de0b5SKeerthy U_BOOT_DRIVER(pmic_lp873x) = { 76ca1de0b5SKeerthy .name = "lp873x_pmic", 77ca1de0b5SKeerthy .id = UCLASS_PMIC, 78ca1de0b5SKeerthy .of_match = lp873x_ids, 79ca1de0b5SKeerthy .bind = lp873x_bind, 80ca1de0b5SKeerthy .ops = &lp873x_ops, 81ca1de0b5SKeerthy }; 82